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... that decreases the number of slow-moving neutrons. In nuclear fusion, nuclei
combine to make nuclei of greater mass. The sun’s energy is produced when
hydrogen nuclei fuse to make helium nuclei. Fusion releases even more energy than
fission. Fusion only occurs at very high temperature- in the excess ...

... 1) If a radioactive sample of rock started with 100
counts per second and 2 hours later has a count rate
of 25 counts per second, what is it’s half-life?
Try these questions, have a go at the answer
1) What do you think is meant by a ‘chain reaction?’
2) The gold that exists on our planet, where did ...

... It contains …in THE form of rods to produce the appropriate result.
The reactor consists OF a fuel, a moderator and A cooling system.
An instrument …neutron WHICH strikes the nucleus of an atom of
U-235.
The nucleus … which collide WITH other nuclei and split, and so on.
However, if no explosion occ ...

... Nuclear power stations, heat from the same chain
reaction is used to make steam to generate
electricity. The chain reaction is controlled by using
uranium that has not been enriched so much, and by
using control rods of materials that absorb neutrons.
The atomic bomb exploding over Nagasaki
In nucle ...

... unstable nucleus into two smaller nuclei.
Either 2 or 3 neutrons are also produced with
the products; these neutrons act as “bullets” to
ram into other unstable nuclei and split them,
resulting in a chain reaction.
All nuclear reactors in the world are fission reactors.
They cannot “blow up” lik ...

... In this example, a stray neutron strikes an atom of U-235.
It absorbs the neutron and becomes an unstable atom of
U-236. It then undergoes fission. Notice that more
neutrons are released in the reaction. These neutrons
can strike other U-235 atoms to initiate their fission.
...

... In the core of a star, hydrogen nuclei combine in fusion
reactions. Once the hydrogen has been exhausted, fusion of
helium nuclei can occur. Once the helium is used up, if the star
is sufficiently massive, fusion of heavier and heavier nuclei can
occur. Consider fusion reactions involving two nucle ...

... 13. What is one benefit associated with a nuclear fission reaction?
1) The products are not radioactive.
2) Stable isotopes are used as reactants.
3) There is no chance of biological exposure. 4) A large amount of energy is produced.
14. Given the balanced equation representing a nuclear reaction:
...

... the nucleus splits into two smaller nuclei and some
neutrons. There are a number of possible fission
products—the only restriction is that the total mass
number of the products must remain the same as
the total mass number of the reactants. For
example, the fission of uranium-235 can produce
an atom ...

... The energy released in the fission process
generates heat, some of which can be
converted into usable energy.
This heat is used to boil water to produce
pressurized steam.
Steam turns turbine of a generator.
Generator makes electricity.
...

... b. Either 2 or 3 neutrons are also produced with the products.
c. These neutrons act as "bullets" to ram into other unstable nuclei and split them,
resulting in a chain reaction.
d. All nuclear reactors in the world are fission reactors.
1) They cannot "blow up" like an atom bomb.
2) They produce ra ...

... How does the enriching process for uranium work? What technique is used? What is the starting material and what
is achieved in the process?
What are the aftereffects of Chernobyl?
What are some of the benefits of nuclear chemistry and what are some of the drawbacks?
How do breeder reactors work? Why ...

... Nuclear Fission and Energy: The splitting of atoms
produces a large amount of energy. This energy is
produced in nuclear power plants
Problems with nuclear power: The waste produced
has to be safely stored for thousands of years.
...